There was some discussion a couple of weeks ago about the CAS State of the Birds report article that cited estimated cerulean warbler numbers. Coincidently, the September issue of Journal of Field Ornithology has an article (pps. 311-319) that discusses the pitfalls and variables in the distance sampling method of estimating population abundance in golden-cheeked warblers. There seem to be a lot of ways these counts can be off. Kathy Van Der Aue, Southport, CT kvda@optonline.net